Method of brazing parts of Ti-Al-Nb alloy

Abstract

A brazing alloy-filler metal for brazing parts made of TiAlNb alloys has a brazing temperature of about 1020° to 1250° C. and a composition of, in weight percent, 37-75 titanium, 5-43 niobium, 20-58 nickel.

I claim: 
     
       1. The method of joining metal parts made of a TiAlNb alloy having a solution heat treating temperature of about 1200° C. comprising the steps of disposing a brazing alloy at the joint between the parts, the brazing alloy having a brazing temperature between about 1020° C. to 1250° C. and having a composition of, in weight percent, 37-75 titanium 5-43 niobium, 20-58 nickel and brazing the parts at a temperature of about 1020° C. to 1250° C. to form a uniform fillet at the joint. 
     
     
       2. The method of claim 1 wherein the brazing alloy has a composition of 45 Ti, 20 Nb, 35 Ni. 
     
     
       3. The method of claim 1 wherein the brazing alloy has a composition of 40 Ti, 25 Nb, 35 Ni. 
     
     
       4. The method of claim 1 wherein the brazing alloy has a composition of 40 Ti, 20 Nb, 40 Ni. 
     
     
       5. The method of claim 1 wherein the brazing alloy has a composition of 60 Ti, 15 Nb, 25 Ni. 
     
     
       6. The method of claim 1 wherein the brazing alloy has a composition of 50 Ti, 15 Nb, 35 Ni.